Persicaria prostrata

Persicaria prostrata, basionym Polygonum prostratum, is a species of flowering plant in the family Polygonaceae, native to Australia[3] and perhaps New Zealand.[4] It is known by the common name of creeping knotweed.[5]

Persicaria prostrata
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Persicaria
Species:
P. prostrata
Binomial name
Persicaria prostrata
(R.Br.) Soják[1][2]
Occurrence data from AVH
Synonyms[3]
  • Polygonum prostratum R.Br.

Description

Decumbent perennial herb with stems up to about 40 cm long.[5] Leaves lanceolate to narrowly elliptic, 1–5 cm long, 3–10 mm wide with short hairs on the margins and main veins.[5][6] Ochreas lobed with hairs 1–2 mm long.[5][6] Compact short cylindrical flower spikes from 0.6–4 cm long and 4–7 mm diameter.[6]

Ecology

Persicaria prostrata grows on banks of streams, ground-tanks and ditches[6] and on heavy soils in areas prone to inundation.[5]

Taxonomy

The plant was first described in 1810 by Robert Brown as Polygonum prostratum,[7][8] but was assigned to the genus Persicaria by Jiří Soják in 1974.[1][2]

  • Habitat
  • Habitat
  • Detail of leaves and ochreas
  • Flower spike
  • Flowers

References
  1. "Persicaria prostrata". Australian Plant Name Index, IBIS database. Centre for Plant Biodiversity Research, Australian Government.
  2. Sojak, J. (1974). "Bemerkungen zur Gattung Truellum Houtt. (Polygonaceae)" (PDF). Preslia. 46 (2): 154.
  3. "Persicaria prostrata (R.Br.) Soják | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2020-03-08.
  4. "Persicaria prostrata | New Zealand Plant Conservation Network". Retrieved 2020-03-08.
  5. Stajsic, V. (2019-03-29). "Flora of Victoria: Persicaria prostrata". VICFLORA Flora of Victoria. Retrieved 2020-03-08.{{cite web}}: CS1 maint: url-status (link)
  6. Wilson, K. L. (2014). "PlantNET - FloraOnline: Persicaria prostrata". plantnet.rbgsyd.nsw.gov.au. Retrieved 2020-03-08.{{cite web}}: CS1 maint: url-status (link)
  7. "Polygonum prostratum". Australian Plant Name Index, IBIS database. Centre for Plant Biodiversity Research, Australian Government.
  8. Brown, R. (1810) Prodromus florae Novae Hollandiae et insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805: 419
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